Lunch box



FIG. 1 is a top front side perspective view of a lunch box showing my new design;

FIG. 2 is a bottom rear side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of a portion indicated by a reference character 9 in FIG. 8.

The broken lines in the drawings illustrate portions of the lunch box that form no part of the claimed design. 

CLAIM The ornamental design for a lunch box, as shown and described. 